Two law firms said they had filed claims on behalf of VW shareholders seeking a total of USD 2.83 billion in damages and interest.
That came on top of more than USD 3.39 billion claimed by 278 plaintiffs who lodged their complaint last week at the court of Brunswick, a northern city close to VW's headquarters in Wolfsburg.
VW, which until recently entertained ambitions of becoming the world's biggest carmaker, has been plunged into its deepest-ever crisis by revelations last September that it installed emissions-cheating software into 11 million diesel engines worldwide.
Just days after the the scandal went public, the group's stocks plunged as much as 40 per cent.
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The shareholders say the carmaker knew about the irregularities long before the scandal broke and should have informed stock owners much earlier because the company must have known it would affect the share price.
But VW has repeatedly reiterated that its management board fulfilled its disclosure obligation under German capital markets law.